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Engineering Flight Test Of The Ah 1g Helicopter To Determine The Area Of Inadequate Directional Control Power At 8100 Pounds Gross Weight
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Book Synopsis Engineering Flight Test of the Ah-1g Helicopter to Determine the Area of Inadequate Directional Control Power at 8100 Pounds Gross Weight by : John R. Melton
Download or read book Engineering Flight Test of the Ah-1g Helicopter to Determine the Area of Inadequate Directional Control Power at 8100 Pounds Gross Weight written by John R. Melton and published by . This book was released on 1968 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The test was conducted at Grand Prairie Municipal Airport near Fort Worth, Texas, from 4 August 1967 to 12 August 1967 by the US Army Aviation Test Activity (USAAVNTA). Paced in-ground-effect (IGE) flight, hovering in winds, approaches to a spot, and arrestment of turn rates at various wind azimuths were investigated.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engineering Flight Test AH-1G Helicopter (Hueycobra). Phase D (Airworthiness and Flight Characteristics). Part 2. Performance by : Rodger L. Finnestead
Download or read book Engineering Flight Test AH-1G Helicopter (Hueycobra). Phase D (Airworthiness and Flight Characteristics). Part 2. Performance written by Rodger L. Finnestead and published by . This book was released on 1970 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the scope of this test, the AH-1G helicopter is suitable for the armed helicopter mission provided the insufficient directional control power and inadequate tail rotor drive system torque limitations are corrected. A directional control margin of 10 percent while hovering is the minimum acceptable for normal operation. Installation of the engine inlet screens and the engine particle separator decrease the performance capability of the AH-1G when maximum power available is the limiting parameter. The level-flight performance capabilities of the AH-1G vary with longitudinal cg location and improve as the cg moves aft. The degradation of hover performance capability when hovering in adverse crosswind is significant. The excellent climb performance, particularly from SL to 10,000 feet, enhances the capability of the AH-1G for the attack helicopter mission.
Book Synopsis AH-1G Lateral Flight Performance Test by : Leslie J. Hepler
Download or read book AH-1G Lateral Flight Performance Test written by Leslie J. Hepler and published by . This book was released on 1972 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lateral flight performance of the tractor-tail-rotor-configured AH-1G helicopter was evaluated at gross weights of 8500 and 9500 pounds. The AH-1G is capable of 0.53g and 0.38g accelerations in right and left lateral flight, respectively, at 8500 pounds. At a 9500-pound gross weight, acceleration was 0.23g to the right and 0.20g to the left. Aircraft handling qualitites and time required to attain maximum lateral velocity are dependent upon rate and type of control application. A step-type lateral control input permitted rapid attainment of accelerating attitude but produced yaw oscillations which resulted in loss of directional control and caused high pilot workload in stabilizing power and aircraft attitude. Ramp inputs delayed establishment of the accelerating attitude. A modified pulse input induced negligible roll and yaw oscillation and produced rapid establishment of the desired roll attitude. Direction-of-flight reversals induced large power transients that frequently exceeded the transmission torque limits. Precise heading and pitch attitude could not be maintained during the reversals. Airspeed in lateral flight could not be determined without special airspeed measuring devices. The sideward airspeed limit was exceeded frequently in left lateral flight with no warning or cue to the pilot that the limit had been reached.
Book Synopsis Engineering Flight Test of the Ah-1g Helicopter (hueycobra). Phase B by : John R. Melton
Download or read book Engineering Flight Test of the Ah-1g Helicopter (hueycobra). Phase B written by John R. Melton and published by . This book was released on 1968 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part 1 of the AH-1G helicopter Phase B test was conducted at Ft Hood, Texas by the US Army Aviation Test Activity, Edwards AFB, California. The helicopter flying qualities were evaluated throughout the aircraft speed range for the Scout and Hog configurations at a mid-center-of-gravity location. Flying qualities were also evaluated during weapons firing and external stores jettison. The primary deficiencies detected during this test were stability and Control augmentation system (SCAS)-pylon coupling, inadequate in-ground-effect (IGE) directional control power, undue pilot attention required to avoid exceeding the torque limits of the helicopter transmission in dives and left rolls with fixed collective, and an inadequate, illogical fire control system. Other shortcomings were detected, such as airspeed system errors, degradation of flying qualities with SCAS off, static lateral cyclic control force imbalance, and marginal cockpit ventilation. Helicopter reactions to weapons firing and external stores jettison were satisfactory, and the contractor approved flight envelope for firing and jettison was acceptable.
Book Synopsis Engineering Flight Test, AH-1G Helicopter, Heavyweight Autorotational Evaluation by : Joseph C. Watts
Download or read book Engineering Flight Test, AH-1G Helicopter, Heavyweight Autorotational Evaluation written by Joseph C. Watts and published by . This book was released on 1974 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineering flight tests were conducted by the United States Army Aviation Systems Test Activity to determine if any adverse autorotational entry or landing characteristics would preclude increasing the maximum operational gross weight of the AH-1G helicopter above the current 9500 pounds. A production AH-1G helicopter with tractor tail rotor was flown 14.4 hours at Edwards Air Force Base, California between 26 September and 12 October 1973 in the Hog configuration. Autorotational entries were performed successfully at gross weights from 9000 to 10,000 pounds from climbs, level flight, and dives. (Modified author abstract).
Book Synopsis Height-Velocity Test AH-1G Helicopter at Heavy Gross Weight. Part 1. Low Elevation by :
Download or read book Height-Velocity Test AH-1G Helicopter at Heavy Gross Weight. Part 1. Low Elevation written by and published by . This book was released on 1974 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Army Aviation Systems Test Activity conducted engineering flight tests to determine the operational height-velocity envelopes of the AH-1G helicopter at 9000 and 9500 pounds gross weight. This report constitutes the low elevation part of the evaluation conducted at Edwards Air Force Base, California, from 14 November 1973 through 5 February 1974. Operational height-velocity envelopes were defined from test data, are valid for 9000 and 9500 pounds at density altitudes up to 1000 feet, and represent combinations of airspeed and height above ground level where a straight-ahead landing may be accomplished following an engine failure. Autorotational landings at gross weights over 9250 pounds will probably result in rotor overspeed and the height above ground level at which the flare is executed becomes more critical as gross weight is increased to 9500 pounds. The operator's manual lacks clarity in describing pilot techniques to be used during the height-velocity maneuver and needs improvement in other areas. The height-velocity diagram developed during this evaluation, a discussion of the height-velocity diagram, a more thorough discussion of pilot techniques, the correct airspeed calibration chart, and the hog configuration descent performance chart should be incorporated in the operator's manual. A radio altimeter should be installed as standard equipment on the AH-1G helicopter.
Book Synopsis Engineering Flight Test AH-1G Helicopter (Hueycobra). Phase D. Airworthiness and Flight Characteristics. Part 2. Performance, Addendum by : Rodger L. Finnestead
Download or read book Engineering Flight Test AH-1G Helicopter (Hueycobra). Phase D. Airworthiness and Flight Characteristics. Part 2. Performance, Addendum written by Rodger L. Finnestead and published by . This book was released on 1971 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: This addendum to the performance report presents the results of turning performance, in-ground-effect (IGE) level acceleration and deceleration performance and dive recovery tests. These three tests were conducted to validate portions of the AH-1G operator's manual (TM 55-1520-221-10) and enhance the knowledte of interested government agencies as to the limitations and capabilities of the AH-1G helicopter. Three major limitations were encountered during testing that restricted the pilot from achieving maximum performance: level acceleration and deceleration performance IGE is limited by extreme pitch attitudes; level deceleration performance is limited by the pilot's ability to maintain rotor speed below the maximum limit (339 rpm); the cyclic control feedback limits aircraft turning and dive recovery performance at heavy gross weight and/or when high load factors are encountered. (Author).
Book Synopsis Engineering Flight Test of the AH-1G Helicopter (Hueycobra) by : John R. Melton
Download or read book Engineering Flight Test of the AH-1G Helicopter (Hueycobra) written by John R. Melton and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engineering Flight Test of the AH-1G Helicopter Hueycobra. Phase B by : John R. Melton
Download or read book Engineering Flight Test of the AH-1G Helicopter Hueycobra. Phase B written by John R. Melton and published by . This book was released on 1969 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part 2 of the AH-1G helicopter Phase B test was conducted at Bell Helicopter Company, Fort Worth Texas, from 8 September to 26 September 1967 by the US Army Aviation Systems Test Activity, Edwards AFB, California. Part 2 comprised the Phase B testing of the basic configuration (XM-157 rocket launcher outboard on each wing). Earlier tests (Phase B, Part 1) were of the Scout (XM-157 outboard, XM-18 inboard each wing) and Hog (two XM-159 rocket launchers on each wing) configurations. The prototype aircraft for this test was similar to the one previously tested. This test emphasized stability and control testing in the basic configuration.
Book Synopsis Engineering Flight Test AH-1G Helicopter (Hueycobra). Phase D. Part 1. Handling Qualities by : Rodger L. Finnestead
Download or read book Engineering Flight Test AH-1G Helicopter (Hueycobra). Phase D. Part 1. Handling Qualities written by Rodger L. Finnestead and published by . This book was released on 1970 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: The AH-1G helicopter manufactured by Bell Helicopter Company (BHC) was designed specifically to meet the US Army requirements for an armed helicopter. Tandem seating is provided for a two-man crew. The main rotor system is a two-bladed, semi-rigid, 'door hinge' type with the stabilizer bar removed. The engine is derated to 1100 shp due to the maximum torque limit of the main transmission. Distinctive features of the AH-1G are: the narrow fuselage (36 inches), the stub midwing with four external store stations, the integral chin turret. The flight control system is of the mechanical, hydraulically boosted, irreversible type with conventional helicopter controls in the aft cockpit (pilot station). The controls in the forward cockpit (copilot/gunner station) consist of conventional antitorque pedals and sidearm collective and cyclic controls. An electrically operated force trim system is connected to the cyclic and directional controls to induce artificial feel and to provide positive control centering.
Book Synopsis Engineering Flight Test: AH-1G Helicopter (Hueycobra) by : Rodger L. Finnestead
Download or read book Engineering Flight Test: AH-1G Helicopter (Hueycobra) written by Rodger L. Finnestead and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Height - Velocity Test AH-1G Helicopter by : Gregory W. Condon
Download or read book Height - Velocity Test AH-1G Helicopter written by Gregory W. Condon and published by . This book was released on 1971 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The AH-1G height-velocity (H-V) flight test program was conducted at auxiliary test sites near Shafter and Bishop, California. The objective of this program was to develop an operational AH-1G H-V envelope for incorporation into the operator's manual. Near maximum performance H-V envelopes were determined for two gross weights at each of two density altitudes. Operational H-V envelopes were defined from the test data and are valid for all gross weights up to 8300 pounds at density altitudes of sea level and 5500 feet. Although the operational envelopes allow an adequate safety margin, the operational aviator requires additional training to accomplish the specified performance. This training should consist of autorotational entries at all airspeeds for low skid heights and airspeeds below 60 knots for high skid heights. Further AH-1G H-V testing should be conducted to: define the H-V envelopes at gross weights between 8300 and 9500 pounds; determine the autorotational characteristics following a sudden engine failure while accelerating through the recommended takeoff corridor; accurately determine the amount of altitude lost in accelerating to forward airspeed, as a function of pitch rates and pitch attitudes; and to provide data for analysis of skid height above the ground versus advance ratio and density ratio. The operational H-V envelopes and recommended pilot techniques presented in this report should be incorporated into the operator's manual at the earliest possible date. The related information presently in the operator's manual is inaccurate, incomplete and dangerously misleading.
Book Synopsis Engineering Flight Test of the Ah-1g Helicopter Equipped with the Xm-28 Chin Turret with One 7.62mm Automatic Gun (m-134) and One 40mm Grenade Launcher (xm-129)-hybrid. Phase B by : Peter V. Passinisi
Download or read book Engineering Flight Test of the Ah-1g Helicopter Equipped with the Xm-28 Chin Turret with One 7.62mm Automatic Gun (m-134) and One 40mm Grenade Launcher (xm-129)-hybrid. Phase B written by Peter V. Passinisi and published by . This book was released on 1968 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part 5 of the AH-1G helicopter Phase B test was conducted at Yuma Proving Ground, Yuma, Arizona, from 6 through 9 February 1968 by the US Army Aviation Test Activity, Edwards Air Force Base, California. The test consisted of firing the XM-28 chin turret, with one 7.62 millimeter automatic gun (M-134) and one 40 millimeter grenade launcher (XM-129) to determine the weapons system's effect on the stability and control characteristics of the helicopter. No safety of flight restrictions resulted from firing this system within the flight envelope. Correction of four deficiencies is mandatory to provide acceptable mission effectiveness and safety. These deficiencies are the inadequate forward visibility from the pilot's cockpit due to the N-9A gunsight installation, the lack of a fire warning system, the lack of a standby generator for IFR flight, and link jam malfunctions of the minigun during symmetrical pull-out maneuvers. Fifteen shortcomings, for which correction is desirable, limit mission effectiveness. The reliability of the weapons system was questionable and service type testing should be conducted prior to system acceptance. Correction of the deficiencies is mandatory and should be tested prior to deployment. Shortcomings, for which correction is desirable, should be corrected on a high priority basis. (Author).
Book Synopsis Engineering Flight Test. AH-1G Helicopter, Hueycobra, Phase B by : Rodger L. Finnestead
Download or read book Engineering Flight Test. AH-1G Helicopter, Hueycobra, Phase B written by Rodger L. Finnestead and published by . This book was released on 1969 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The AH-1G helicopter Phase B, Part 6 test program was conducted at Shafter, California, and Edwards Air Force Base, California. The program was conducted to determine level flight performance, autorotational performance, engine characteristics, armed helicopter mission capability and to evaluate the in-ground-effect (IGE) handling qualities with the canopy doors removed.
Book Synopsis Engineering Flight Test of the Ah-1g (hueycobra) Helicopter Equipped with the Xm-28 Chin Turret with Twin Xm-129, 40mm Grenade Launchers, Phase B by : John R. Melton
Download or read book Engineering Flight Test of the Ah-1g (hueycobra) Helicopter Equipped with the Xm-28 Chin Turret with Twin Xm-129, 40mm Grenade Launchers, Phase B written by John R. Melton and published by . This book was released on 1968 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Firing tests were conducted to determine the effects on the stability and control characteristics of the AH-1G helicopter caused by firing the twin XM-129, 40mm grenade launchers in the XM-28 chin turret.
Book Synopsis Engineering Flight Test AH-1G Helicopter (Hueycobra) by : Richard B. Lewis
Download or read book Engineering Flight Test AH-1G Helicopter (Hueycobra) written by Richard B. Lewis and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
